A computer adventure game, that is. The genre has mostly died off in the commercial space, but there are still plenty of fans, and Indy Gamer blog has pulled together a list of the top 20 free adventure games for folks to check out. Some of these rival the quality of commercial releases, and many of them are worth a look if you’re a fan. These are mostly PC only, sorry mac folk.
The indygamer blog is a pretty cool source of news on independent games development if you’re a games geek like me and such things interest you, by the by.